package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.EmployeeExistException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Slf4j
@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //进行md5加密，然后再进行比对

        password = DigestUtils.md5DigestAsHex(password.getBytes());
        //log.info(password);
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新建员工
     * @param employeeDTO
     * @return
     */
    @Override
    public void addEmp(EmployeeDTO employeeDTO) {

        try {
            Employee employee = new Employee();
            BeanUtils.copyProperties(employeeDTO,employee);

            employee.setStatus(StatusConstant.ENABLE);
            //default pwd
            employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
            employeeMapper.addEmp(employee);
        } catch (Exception e) {
            throw new EmployeeExistException("用户已经存在，请更换信息");
        }
    }

    /**
     * 查询所有员工
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult queryAllEmps(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.queryEmp(employeePageQueryDTO);
        PageResult pageResult = new PageResult();
        pageResult.setTotal(page.getTotal());
        pageResult.setRecords(page);
        return pageResult;
    }

    /**
     * 设置员工状态
     * @param id
     * @param status
     */
    @Override
    public void setEmpState(Long id, Integer status) {
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .build();
        employeeMapper.updateEmp(employee);
    }

    /**
     * 修改员工数据
     * @param employeeDTO
     */
    @Override
    public void updateEmp(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        employeeMapper.updateEmp(employee);
    }

    /**
     * 按照id 查找员工
     * @param id
     * @return
     */
    @Override
    public Employee getEmpById(Long id) {
        return employeeMapper.getEmpById(id);
    }

    @Override
    public void updateEmpPwd(PasswordEditDTO passwordEditDTO) {
        Employee employee = new Employee();
        log.info("password \\n {}",passwordEditDTO.toString());
        employee.setId(passwordEditDTO.getEmpId());
        String oldpwd = employeeMapper.getEmpById(passwordEditDTO.getEmpId()).getPassword();
        String pwd = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
        if ( oldpwd.equals(pwd)){
            employee.setPassword(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()));
            employeeMapper.updateEmp(employee);
        }else {
            throw new PasswordErrorException("原来密码错误");
        }

    }





}
